Exactly, why would you wait in line for drive-in when you can just park your car and order inside? I thought the concept of drive-in was invented to save time, not waste it.
In North America it is common to have about 75% of the staff focus on filling drive thru orders while the rest handle walk ins. I'll frequently see 4-5 employees working different stations to make the drive thru flow while 1 employee has to handle all the work (except maybe the grill) for the walk ins.
In nearly every aspect of life in North America, you are treated as a second class citezen if you walk instead of drive.
Where I work, most of the staff are focused on the drivethru. You have only 3 employees for dine-in and DoorDash/Uber/Skip. One makes all of the sandwiches, one runs back and forth to grab drinks and fries from the stations, and the other is the front counter order taker. We still get horribly overwhelmed because people tend to show up in large groups, usually high school students or seniors. The poor fry station person has to make both the drivethru and dine-in orders quickly.